Fifa is considering expanding its Club World Cup tournament from seven to 24 teams, according to the president of the German Football Association.
Reinhard Grindel, who is also a council member at the world football governing body, suggested the revamped competition could replace the Confederations Cup and take place in the summer.
Fifa's plans, discussed by council members at a meeting in India last week, are for a 24 team tournament divided into three groups of eight taking place over 18 days, Grindel added.
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The Club World Cup currently takes place in December and features seven teams: the holders of the Champions League, Asian Champions League, African Champions League, Oceania Champions League, Central and North America's Concacaf Champions League and South America's Copa Libertadores.
Grindel says he opposes the expansion plans and believes Fifa should focus on national team tournaments.
"I have voted against an inflation of the competition," said Grindel.
"The players need rest and time for regeneration in June. Fifa should focus on the competitions for national teams.
"I'm very curious how the clubs judge these plans. In March 2018, the Fifa council will definitively decide."
The Club World Cup holds prestige in South America but is largely ignored in Europe — despite the dominance of its teams in the competition — where it clashes with the domestic season.
Real Madrid won last year's title, beating Kashima Antlers of Japan in the final, to make it five Spanish winners in the last eight editions of the competition.
Manchester United are the only English club to have lifted the trophy, which has been contested 13 times. They won in 2008 when Wayne Rooney's goal gave them a 1-0 victory over Ecuador's LDU Quito in Japan.